"Arrow" star Katie Cassidy has struck a deal with The CW that makes her a series regular across all of the network's superhero shows. During the "Arrow" panel at Comic-Con International in San Diego, executive producer Wendy Mericle announced Cassidy will add "The Flash" and "Legends of Tomorrow" to her resume, following in the footsteps of John Barrowman and "Legends of Tomorrow's" Wentworth Miller.

"With Laurel being gone, it's incredibly important for the team to move forward, remembering that legacy and honoring it," Mericle said. "We will definitely see [Katie] Cassidy in the season premiere." After that, she added that Cassidy has a deal to appear across all of The CW's DCTV shows.

Cassidy played Laurel Lance in the first four seasons of "Arrow." In Season 3, she became Black Canary to honor her sister Sara, who was murdered by Malcolm Merlyn and also bore the Black Canary mantle. In Season 4, Laurel herself was killed by Damien Darhk. It is unclear how and why she will come back in future seasons of these shows.